摘要
本文首先借助运动倒置概念,得出了求机构中不相邻两构件间速度瞬心的一种新方法,称为运动倒置法,用此方法求机构中速度瞬心时比用三心定理更为简捷.接着,本文用此种方法对单自由度平面多杆Ⅱ级和Ⅲ级机构进行速度分析,分析时只需求出几个有关瞬心即可,因而充分显示出此种方法简单、快速的地点.
Using a concept of moving renerse position, the author obtains a new method to seek out the instantaneous velocity centres between two non-adjacent elements in a mechanism. This method, which may be called moving reverst position method, is more simple than the three centre theory method used for the same purpose. Using this method, the paper indicates how to analyze velocities of I -grade and I -grade flat multi-element mechanisms of single degree of freedom. During the analysis, it is necessary only to seek out several respective instantaneous centres. Therefore, this method exhibits fully advantages of both simplicity and rapidity.
